Answer:
C. x=-5 or x=20
Step-by-step explanation:
Factor [tex]x^{2}[/tex]-15x−100 using the AC method
(x-20)(x+5)=0
If any individual factor on the left side of the equation is equal to 0, the entire expression will be equal to 0
x−20=0
x+5=0
Set x−20 equal to 0and solve for x
x=20
Set x+5 equal to 0 and solve for x
x=−5
The final solution is all the values that make (x−20)(x+5)=0 true. The multiplicity of a root is the number of times the root appears.
x=20(Multiplicity of 1)x=−5 (Multiplicity of 1)
The solutions to the equation x² - 15x - 100 = 0 are:
x = 20 and x = -5.
What is a solution?Solutions are the values of an equation where the values are substituted in the variables of the equation and make the equality in the equation true.
We also find the solution in a system of equations using the substitution or elimination method.
Example:
2x + 4 = 8
The solution is x = 2.
We have,
To use the zero product property to solve the equation:
x² - 15x - 100 = 0.
Factor the left-hand side of the equation:
(x - 20)(x + 5) = 0
Apply the zero product property, which states that if the product of two factors is zero, then at least one of the factors must be zero:
x - 20 = 0 or x + 5 = 0
Solve for x in each equation:
x - 20 = 0
x = 20
x + 5 = 0
x = -5
Therefore,
The solutions to the equation x² - 15x - 100 = 0 are:
x = 20 and x = -5.
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For the function f(x) = (2e)5, find
ƒ−¹(x).
Answer:
no
Step-by-step explanation:
89382
What is the answer for this question 2 (6² +2²)÷4-10
Step-by-step explanation:
2 . (6² + 2²) ÷ 4 - 10
= 2 . (36 + 4) ÷ 4 - 10
= 2 . 40 ÷ 4 - 10
= 80 ÷ 4 - 10
= 20 - 10
= 10
The height above ground of a cannon is a function of the time since it was shot.
Question: When time equals 0, why is the height of the cannon ball not equal to 0? Describe the domain of this function. Describe the range.
The height of the cannonball not equal to 0 when time equals 0 because initial height of the cannonball is above the ground
When time equals 0, why is the height of the cannonball not equal to 0?From the graph, we have the y-intercept to be
y-intercept = (0, y), where y > 0
This means that the graph starts above the origin
This in other words mean that the initial height of the cannonball is above the ground (e.g. it could be on a building)
Hence, the height of the cannonball not equal to 0 when time equals 0 because initial height of the cannonball is above the ground
Describe the domain and the range of this functionIn this case, the domain is from t = 0 till the ball lands on the floor, while the range is from the initial height of the cannonball till the maximum height
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Based on the graph, estimate (to one decimal place) the average rate of change f
The estimate (to one decimal place) of the average rate of change f is 1.7
How to estimate (to one decimal place) the average rate of change f?The interval is given as
x = 1 to x = 4
This can be represented as
(a, b) = (1, 4)
From the attached graph, we have
f(1) = 2
f(4) = 7
The estimate (to one decimal place) of the average rate of change f is
Rate = [f(b) - f(a)]/[b - a]
This gives
Rate = [f(4) - f(1)]/[4 - 1]
So, we have
Rate = [7 - 2]/[4 - 1]
Evaluate
Rate = 1.7
Hence, the estimate (to one decimal place) of the average rate of change f is 1.7
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The cubic function p(x) = ax^3 + bx^2 + cx + d has a tangent equation y = 3x + 1 at the point (0, 1) and has a turning point at (-1, -3). Find the values of a, b, c and d. ( Show all ways of solving this math) btw the answer is a = -5, b = -6, c = 3, d = 1. show me the clearest workout
Answer:
[tex]p(x) = -5x^3 -6x^2 + 3x + 1[/tex]
Step-by-step explanation:
Given cubic function:
[tex]p(x) = ax^3 + bx^2 + cx + d[/tex]
As point (0, 1) is on the curve, substitute x = 0 into the function, set it to 1, and solve for d:
[tex]\begin{aligned} p(0) & = 1\\ \implies a(0)^3 + b(0)^2 + c(0) + d & = 1\\ \implies d & = 1 \end{aligned}[/tex]
Differentiate the function:
[tex]\begin{aligned} p(x)& = ax^3 + bx^2 + cx + d\\\implies p'(x)&=3 \cdot ax^{3-1}+2 \cdot bx^{2-1}+1 \cdot cx^{1-1}+0 \\p'(x)&=3ax^2+2bx+c\end{aligned}[/tex]
The tangent equation at the point (0, 1) is y = 3x + 1.
Therefore, the gradient of the tangent equation when x = 0 is 3.
To find the gradient of the function at a given point, substitute the x-value of that point into the differentiated function. Therefore, substitute x = 0 into the differentiated function, set it to 3, and solve for c:
[tex]\begin{aligned}p'(0) & =3 \\ \implies 3a(0)^2+2b(0)+c & =3\\ \implies c & = 3\end{aligned}[/tex]
Substitute the found values of c and d into the function:
[tex]p(x) = ax^3 + bx^2 + 3x + 1[/tex]
Substitute point (-1, -3) into the function and solve for b:
[tex]\begin{aligned}p(-1) & = -3\\\implies a(-1)^3 + b(-1)^2 + 3(-1) + 1 & = -3\\-a+b-3+1&=-3\\-a+b&=-1\\b&=a-1\end{aligned}[/tex]
To find the turning points of a function, set the differentiated function to zero and solve for x.
As there is a turning point of function p(x) when x = -1, substitute x = -1 into the differentiated function and set it to zero (remembering to substitute the found value of c = 3 into the differentiated function):
[tex]\begin{aligned} p'(-1) & =0\\\implies 3a(-1)^2+2b(-1)+3 & = 0\\3a-2b+3&=0\end{aligned}[/tex]
Substitute the found expression for b into the equation and solve for a:
[tex]\begin{aligned}3a-2b+3&=0\\\implies 3a-2(a-1)+3&=0\\3a-2a+2+3&=0\\a+5&=0\\a&=-5\end{aligned}[/tex]
Finally, substitute the found value of a into the found expression for b and solve for b:
[tex]\begin{aligned}b & = a-1\\\implies b & = -5-1\\b & = -6\end{aligned}[/tex]
Therefore:
a = -5b = -6c = 3d = 1Differentiation Rules
[tex]\boxed{\begin{minipage}{4.8 cm}\underline{Differentiating $ax^n$}\\\\If $y=ax^n$, then $\dfrac{\text{d}y}{\text{d}x}=nax^{n-1}$\\\end{minipage}}[/tex]
[tex]\boxed{\begin{minipage}{4cm}\underline{Differentiating a constant}\\\\If $y=a$, then $\dfrac{\text{d}y}{\text{d}x}=0$\\\end{minipage}}[/tex]
Find an equation for the line graphed below:
Answer: y = -1/5x -3
Step-by-step explanation:
Answer:
Answer given by bryc31 is correct: [tex]y = -\frac{1}{5}x -3[/tex] is correct
I am simply providing an explanation in case you need it
Step-by-step explanation:
The slope-intercept form equation of a straight line in 2D coordinates is given by y = mx + b
where m is the slope(rise/run) and b the y-intercept i.e. the y value where the line intersects the y axis
Given two points (x₁, y₁) and (x₂, y₂) on the straight line, we can compute the slope as follows
m = [tex]\frac{y_2 - y_1}{x_2-x_1}[/tex]
Two distinct points on the line are at (0, -3) and (5,-4)
[tex]m = \frac{-4 -(-3)}{5-0} = \frac{-4 + 3)}{5-0} = \frac{-1}{5} = - \frac{1}{5}[/tex]
So we know the equation to be
[tex]y = - \frac{1}{5}x + b[/tex]
To find b, take any point on the straight line, plug in y and x values in the above equation and solve for b
However, looking at the graph we see that the line crosses the y axis at
y = -3. So this is the value for the y intercept i.e. b
The equation of the line is therefore
[tex]y = - \frac{1}{5}x - 3[/tex]
construct a triangle ABC with line AB= 10cm BC=6cm and AC=11cm. Hence measure the values of the angle
Hence , the construction of the triangle is given below.
AB = 10 cm BC = 6 cm AC = 11 cm
We have to find ∠A, ∠B, and ∠C.
To construct a triangle,
Firstly draw a line segment AB = 10 cm
From A we need a point C at a distance of 6 cm. So with A as the center, draw an arc of 6cm in length from point A.
From B we need a point C at a distance of 11 cm. So with B as the center, draw an arc of 11cm in length from point B.
Mark the point of intersection of the arcs as C.
Meet points C to A and B respectively.
By using a protractor measure the angles of A, B, and C.
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You are installing 250 feet of PVC conduit. Each 100-foot section takes 1/2 can of PVC cement, and each 50-ft section takes 1/4 can. How much cement do you need? Your answer should be in the form of a mixed number, with any remaining fraction in its lowest terms.
While installing 250 feet of PVC conduit given the details we have in the question, The amount of cement needed is 1 1/4 can of PVC cement
How to find quantity of cement neededGiven data
PVC conduit required to be installed = 250 feet
Each 100-foot section takes 1/2 can of PVC cement
Each 50-ft section takes 1/4 can of PVC cement
250 feet will be split into two which is 200 feet and 50 feet. We solve for each separately then add up
solving for 200 feet
200 feet contains how many 100-foot, this is solved as follows:
= 200 / 100
= 2
And each 100-foot takes 1/2 can of PVC cement, therefore:
2 * 1/2 = 1
solving for 50 feet
50 feet takes 1/4 can of PVC cement
= 1/4
The sum: 1 + 1/4 = 1 1/4 ( mix number )
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Geometry please answer quickly I will give brainliest
Answer:
20 +2x+1=7, hope this is the answer
Find the LCM and
GCF of: 25 and 100
Answer:
Look below
Step-by-step explanation:
The LCM of 25 and 100 is 100
The GCF of 25 and 100 are 25.
In Earnest's yard, the grass grew 2 inches. The next week, Earnest cut 2 inches off of the grass. The total change was 0 inches. Which of the following situations also has a total change of 0?
A.It rained 2 inches on Tuesday. Then, it rained 2 inches on Wednesday.
B.It snowed 4 inches last week. Then, 8 inches of snow melted during this week.
C.I put 5 pounds of birdseed in the feeder. Then, birds ate 5 pounds of birdseed.
D.A farmer sold 3 bushels of apples last week. Then, she sold 6 bushels of apples this week.
E.3 feet of growth was cut from a tree branch last year. Then, the tree branch grew 3 feet this year.
F.My family painted a 300 square foot barn on Saturday. Then on Sunday, we painted a 300 square foot garage.
g(x)=−5x+1, find g(1)
Answer:
-4
Step-by-step explanation:
keep value of x as 1 in 5x+1
g(1)=-5×1+1
=-4
SLOVE FOR X , really need help it’s due tmrw thanks
Answer:
3.5
Step-by-step explanation:
21x+6
21/21 6/21
x=3.5
Standing on the roof of a (42.0+A) m tall building, you throw a ball straight up with an initial speed of (14.5+B) m/s. If the ball misses the building on the way down, how long will it take from you threw the ball until it lands on the ground below? Give your answer in seconds and round the answer to three significant figures.
The time it would take from when you threw the ball until it lands on the ground below is equal to 2.16 seconds.
Given the following data:
Height of building = (42.0+A) m = (42.0+9) m = 51 m.
Initial speed of ball = (14.5+B) m/s = (14.5+8) m/s = 22.5 m/s.
Scientific data:
Acceleration due to gravity = 9.8 m/s²
How to determine the time?Generally speaking, when this ball is thrown straight up at a certain speed, it begins to slow down as a result of the effect of downward gravitational acceleration. Consequently, the ball reaches a maximum height where it can't go higher anymore and then starts to fall down due to gravity.
In order to determine the time it would take from when you threw the ball until it lands on the ground below, we would apply the second equation of motion:
S = ut + ½gt²
½gt² + ut - S = 0
Substituting the given parameters into the formula, we have;
0.5(9.8)t + 22.5t - 51 = 0.
4.9t + 22.5t - 51 = 0.
Next, we would solve the quadratic equation by using the quadratic formula:
[tex]t = \frac{-b\; \pm \;\sqrt{b^2 - 4ac}}{2a}\\\\t = \frac{-22.5\; \pm \;\sqrt{22.5^2 - 4(0.5)(-51)}}{2 \times 0.5}\\\\t = \frac{-22.5\; \pm \;\sqrt{506.25 + 102}}{2}\\\\t = \frac{-22.5\; \pm \;\sqrt{608.25}}{2}[/tex]
t = 2.16 or -47.16
Since the time cannot be negative, the value of t to three significant figures is equal to 2.16 seconds.
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Complete Question:
Standing on the roof of a (42.0+A) m tall building, you throw a ball straight up with an initial speed of (14.5+B) m/s. If the ball misses the building on the way down, how long will it take from when you threw the ball until it lands on the ground below? Give your answer in seconds and round the answer to three significant figures.
A=9, B=8
By eating one egg one cupcake and one slice of pizza a child consumes 303 mg of cholesterol. if the child eats three cupcakes in four slices of pizza he or she takes in 93 mg of cholesterol. by eating two eggs in 1 cup cake a child consumes 569 mg of cholesterol. how much cholesterol is in each item?
The amount of cholesterol that is in each is given as c = 19, E = 275 and P = 9
How to solve for the cholesterolWe have to define the variables as:
E + C + P = 303
3C + 4P = 93,
we have to make pizza, P the subject
4P = 93 - 3C,
P = (93 - 3C) / 4
2E + C = 569,
2E = 569 - C
E = (567-C) / 2
We have to form the equation
(569-C)/2 + C + (93-3C)/4 = 303
We have to multiply the equation by 4
(569-C)2 + 4C + 93-3C = 1212
1138 - 2c + 4c + 93 - 3c = 1212
-C = 1212- 93 -1138
-c = -19
hence c = 19 mg for 1 cupcake
E = (569- 19)/2
275 for 1 egg
P = (93-3C)/4
P = 93 - 57 / 4
= 36 / 4
= 9 for one pizza
Hence we would have c = 19, E = 275 and P = 9
19 + 275 + 9 = 303 (proves it to be correct)
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19+274 + 7 = 300 mg
simply the following
2(2x+2y)-14x+7
Answer:
4 y + -10 x + 7
Step-by-step explanation:
Simplify the following:
2 (2 x + 2 y) - 14 x + 7
2 (2 y + 2 x) = 4 y + 4 x:
(4 y + 4 x) - 14 x + 7
Grouping like terms, 4 y + 4 x - 14 x + 7 = 4 y + (4 x - 14 x) + 7:
4 y + (4 x - 14 x) + 7
4 x - 14 x = -10 x:
Answer: 4 y + -10 x + 7
an angle measures 101.4 less then the measure of supplementary angles. what is the measure of each angle
Answer:
39.3°, 140.7°
Step-by-step explanation:
supplementary angles means that together they have 180°.
so, when we have 2 angles, x and y.
x + y = 180
x = y - 101.4
using the second equation in the first
y - 101.4 + y = 180
2y - 101.4 = 180
2y = 281.4
y = 281.4/2 = 140.7°
x = y - 101.4 = 140.7 - 101.4 = 39.3°
so, the starting angle is 39.3°, and every supplementary angle is then 140.7°.
Figure LMNO is dilated to form figure L'M'NO'.
Where is the center of dilation located?
inside figure LMNO
outside figure LMNO
on a vertex of figure LMNO
L
M
L'
M'
O
-0'-
The location of a center of dilation in the figure is at the point where the corresponding vertex of the pre–image and image overlaps, which is point N, the correct option is therefore;
On a vertex of figure LMNOHow can the center of dilation be found?The given pre–image = Parallelogram LMNO
The image obtained from the pre–image = Parallelogram L'M'N'O'
Required: The location of the center of dilation
Solution:
The center of dilation is the point about which the figure or image is dilated.
It is the point that does not change following the dilation.
A vertex on the pre–image that gives an image vertex at the same point, is at the center of dilation which does not change in both the pre–image and image.
Therefore, given that point N and N' coincides, which indicates that the distance the pre–image point N is dilated to get the image point, N is 0. The center of dilation is at the vertex N.
The correct option is therefore;
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Answer:
On a vertex of figure LMNO
Step-by-step explanation:
(05.01)Which statement best describes the area of the triangle shown below?
It is one-half the area of a rectangle of length 4 units and width 2 units.
It is one-half the area of a square of side length 4 units.
It is twice the area of a rectangle of length 4 units and width 2 units.
It is twice the area of a square of side length 4 units.
A statement that best describes the area of the triangle is It is one-half the area of a square of side length 4 units.
What is the area of the triangle?The area of a triangle can be found by the formula:
= 1/2 x base x height
The base is 4 units and the height if 4 units.
Area of the triangle is:
= 1/2 x 4 x 4
= 8 units²
The area of a square of side length 4 units. is:
= 4 x 4
= 16 units²
In conclusion, option B is correct.
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The functions fand g are defined as follows.
g(x)=2x³ +6
f(x)=-4x-1
Find f(7) and g (-3).
Simplify your answers as much as possible.
f(7)=
g(-3)=
how many liters make a kilogram
Answer:
One litre of water has a mass of almost exactly one kilogram.kilograms = liters × density of a liquid.
The height, above the ground, of a block on a vertical spring is a sinusoidal (trigonometric) function of time. In the interval from time 2.1 seconds to time 2.7 seconds, the block's height decreases from its maximum of 48 inches to its minimum of 30 inches. Which function h(t) could model the block's height in inches above the ground at time t seconds?
The sinusoidal function for the given conditions can be written as h(t) = 9cos(1.67π(x - 2.1)) + 39.
What is sinusoidal function?The term sinusoidal refers to a curve, also known as a sine wave or a sinusoidal, that shows smooth, periodic oscillation. It is named after the function y=sin (x). Sinusoidal appear often in mathematics, physics, engineering, signal processing, and many other fields.
A general form of a cosine function is given as shown below,
g(x) = a cos(bx+c) + d
Where the values of the given constant is,
a = amplitude
b = The period is of 2pi/B
c = phase shift
d = vertical shift
Since for the given condition the greatest value is 48 and the smallest value is 30 (a difference of 18), therefore, the amplitude is of the function can be written as,
2a = 18
a = 9
Further, a conventional cosine function with amplitude 9 would fluctuate between -9 and 9, while this one ranges between 30 and 48, resulting in d = 39 vertical shift.
Also, The minimum and maximum values form half the period, therefore, we can write,
π/B = 2.7 - 2.1
B = π/0.6
B = 1.67π.
Furthermore, The maximum value in the normal function is at x = 0, but the greatest value in this function is at x = 2.1, thus, the phase shift is 2.1 units to the right, or c = -2.1.
Hence, the sinusoidal function for the given conditions can be written as h(t) = 9cos(1.67π(x - 2.1)) + 39.
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I need to find the error in the equation
Answer:
20 - i
Step-by-step explanation:
Addition of complex numbers:In complex number addition/subtraction, add the imaginary part and add the real part separately.
The error is while adding imaginary part, you have to combine the coefficients of the imaginary numbers. So, -3 +2 will give us -1. So, the result is -i.
16 - 3i + 4+ 2i = 16 + 4 -3i + 2i
= 20 - i
Answer:
20 - i
Step-by-step explanation:
The error made during second step:
When adding or subtracting expression, we add or subtract like terms.
(16 - 3i) + (4 + 2i) get rid of parenthesis
16 - 3i + 4 + 2i add/subtract like terms
20 - i (the mistake is made here, instead of "i" they typed i^2)
y
X
-9
-6
3
9
x - 1
x
3
у
Answer:
see explanation
Step-by-step explanation:
-9x = -3y
-6x = 2 1/5y
3x = 0y
9x = 2y
Which of the following Statements are true?
Statement 1: A right triangle can be an equilateral triangle.
Statement 2: An equilateral triangle can be a right triangle.
Step-by-step explanation:
both statements are wrong.
a right (or right-angled) triangle has a 90° angle. that is all.
an equilateral triangle has 3 equally long sides.
but that also implies that the 3 angles must be equal too.
the sum of all angles in a triangle must be 180°.
if all angles are equally large, that means
180 = 3×angle
angle = 180/3 = 60°.
that means none of the angles can be 90°, so, no right-angled triangle can be equilateral.
and no equilateral triangle can be right-angled.
f(x)=2x^2-6
Find f(7)
Answer:
f(7) = 92
Step-by-step explanation:
f(7) means what is the value of f(x) when x = 7
substitute x = 7 into f(x)
f(7) = 2(7)² - 6 = 2(49) - 6 = 98 - 6 = 92
The speed of an object is given by the following formula: where s is the speed of the object, d
is the distance traveled in miles, and t is the time traveled in hours. If a car travels 312 miles at a
rate of 52 mph, how long did it take?
18:5=5/18 true or false
i responded to this already but it it is FALSE
Answer: False
Step-by-step explanation: Ratio is A:B = A/B
Assume the statements below are true. If exactly two of the students went to the movies, who did NOT go to the movies?
If Catherine goes to the movies, then Jessika will go.
If Jessika goes to the movies, then Jorge will go.
If Jorge goes to the movies, then Mike will go.
Answer:Jorge and Mike
Step-by-step explanation:
Nobody goes if Mike goes
Maricopa's Success scholarship fund receives a gift of $ 115000. The money is invested in stocks,
bonds, and CDs. CDs pay 3.75 % interest, bonds pay 4.8 % interest, and stocks pay 7.2 % interest.
Maricopa Success invests $ 45000 more in bonds than in CDs. If the annual income from the
investments is $ 6322.5, how much was invested in each account?
stock=
bonds=
cds=
The value invested in each security will be:
stock= $38000 ,
bonds= $46000
cds= $3000
How to calculate the value?Let the money invested in stocks be 'x', bonds be 'y' and CDs be 'z'.
Total money received as fund = x+y+z = $115000 -(Eqn 1)
$15000 more is invesed in bonds as compared to CDs i.e y = z + $15000 - (Eqn2)
Stocks pay 6.8%, bonds pay 3.6% and CDs pay 4% interest
Interest earned from stocks = 6.8% of x = 0.068x
Interest earned from bonds = 3.6% of x = 0.036x
Interest earned from CDs = 4% of x = 0.04x
Total interest earned = 0.068x + 0.036y + 0.04z = $5840 - (Eqn 3)
x + y + z =$115000 ----(1)
y = z + $15000 -----(2)
0.068x + 0.036y + 0.04z = $5840 ------(3)
Putting y = z+$15000 in Eqn 1 gives us:
x + (z+$15000) + z = $115000 ==> x = $100000 - 2z ----(Eqn 4)
Similarly,
Putting y = z+$15000 in Eqn 3 gives us:
0.068x + 0.036(z+$15000) + 0.04z = $5480 ==> 0.068x + 0.076z = $4940 ----(Eqn 5)
Putting Eqn 4 in Eqn 5,
0.068($100000 - 2z) + 0.076z = $4940
Hence, 0.06z = $1860
z = $31000
Put z = $31000 in Eqn 4 and get x = $100000 - 2z = $38000
Put z = $31000 in Eqn 2 and get y = z + $15000 = $46000
Hence final answer: x = $38000 , y = $46000, z = $31000
where x is the money invested in stocks, y in bonds and z in CDs.
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